Baby No. 2! Nicky Hilton celebrated her impending bundle of joy on Tuesday surrounded by her friends and family.

The 34-year-old wore a blue printed long-sleeved dress and matching velvet heels. As if to dispel baby gender theories based on her dress color, Nicky’s sister, Paris Hilton, sported a pink and white dress.

NEW YORK, NY - OCTOBER 28: Paris Hilton (L) and Chris Zylka attend 2017 amfAR and The Naked Heart Foundation Fabulous Fund Fair at Skylight Clarkson Sq on October 28, 2017 in New York City. (Photo by Michael Stewart/FilmMagic)

NEW YORK, NY - OCTOBER 26: Paris Hilton and Chris Zylka during the Fashion Group International 34th Annual Night of Stars Gala on October 26, 2017 in New York City. (Photo by Gonzalo Marroquin/Patrick McMullan via Getty Images)

LOS ANGELES, CA - SEPTEMBER 21: Paris Hilton and Chris Zylka attend the premiere of 'SPF-18' at University High School on September 21, 2017 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)

LOS ANGELES, CA - SEPTEMBER 21: Businesswoman Paris Hilton (L) and actor Chris Zylka attend the premiere of Alex Israel's 'SPF-18' at University High School on September 21, 2017 in Los Angeles, California. (Photo by David Livingston/Getty Images)

NEW YORK, NY - SEPTEMBER 11: Model Paris Hilton (L) and actor Chris Zylka attend Annual Charity Day hosted by Cantor Fitzgerald, BGC and GFI at BGC Partners, INC on September 11, 2017 in New York City. (Photo by Robin Marchant/Getty Images for Cantor Fitzgerald)

LOS ANGELES, CA - AUGUST 25: Paris Hilton and Chris Zylka are seen on August 25, 2017 in Los Angeles, California. (Photo by SMXRF/Star Max/GC Images)

LOS ANGELES, CA - AUGUST 23: Paris Hilton and Chris Zylka are seen on August 23, 2017 in Los Angeles, California. (Photo by gotpap/Bauer-Griffin/GC Images)

LOS ANGELES, CA - AUGUST 21: Paris Hilton and Chris Zylka are seen on August 21, 2017 in Los Angeles, California (Photo by SMXRF/Star Max/GC Images)

CANNES, FRANCE - MAY 24: Paris Hilton (L) and Chris Zylka attend the L'Oreal Paris Cinema Club party, celebrating L'Oreal's 20th anniversary as the official beauty partner of the Cannes Film Festival, at the Martinez Hotel Beach on May 24, 2017 in Cannes, France. (Photo by David M Benett/Dave Benett/Getty Images)

CANNES, FRANCE - MAY 24: Paris Hilton and Chris Zylka attend the Gala 20th Birthday Of L'Oreal In Cannes during the 70th annual Cannes Film Festival at Hotel Martinez on May 24, 2017 in Cannes, France. (Photo by Antonio de Moraes Barros Filho/FilmMagic)

CAP D'ANTIBES, FRANCE - MAY 23: Paris Hilton (L) and Chris Zylka attend the de Grisogono 'Love On The Rocks' party during the 70th annual Cannes Film Festival at Hotel du Cap-Eden-Roc on May 23, 2017 in Cap d'Antibes, France. (Photo by David M Benett/Dave Benett/Getty Images )

CANNES, FRANCE - MAY 20: (L-R) Paris Hilton and boyfriend Chris Zylka arrive at Nice airport during the 70th annual Cannes Film Festival at on May 20, 2017 in Cannes, France. (Photo by Marc Piasecki/GC Images)